Appian Enterprise Patterns

Practical, vendor-neutral architecture patterns for building maintainable enterprise applications on the Appian low-code platform.

This repository collects the recurring design decisions that show up on almost every large Appian program — record-centric modelling, role-based access, resilient integrations, audit logging, and disciplined releases — and writes them down as generic, reusable patterns.

Disclaimer This is generic educational material. It contains no proprietary Appian platform code, no client or banking code, no customer data, and no internal naming, URLs, or credentials. Examples are illustrative and fictional. "Appian" is a trademark of Appian Corporation; this project is not affiliated with or endorsed by Appian.

Appian makes it fast to ship a first version of an application. What it does not do is stop teams from accumulating architectural debt: permissions scattered across objects, integrations that fail silently, records modelled as an afterthought, and releases that can't be reproduced. By the time this hurts, the application is in production and hard to change.

These patterns are about design discipline, not platform tricks. They are technology-adjacent but written so the principles transfer to any enterprise workflow platform. Each pattern states the context, the forces at play, the recommended approach, and the trade-offs.

In scope:

• Record-centric information architecture
• Role-based access control (RBAC) and a permissions matrix
• Integration and error-handling patterns
• Audit logging expectations
• Deployment and release discipline

Out of scope: platform-specific tuning, licensing guidance, and anything that would require exposing real project material.

The architecture diagrams show how these patterns fit together across presentation, orchestration, data, integration, security, and audit layers.

flowchart LR
    U[User / Group] -->|Membership| RBAC[RBAC Layer]
    RBAC --> UI[Interfaces & Sites]
    UI --> PM[Process Models]
    PM --> REC[(Record Types)]
    PM --> INT[Integrations]
    INT -->|REST / RPA| EXT[External Systems]
    PM --> AUD[[Audit Log]]
    REC --> AUD
    classDef store fill:#eef,stroke:#557;
    class REC,AUD store;

See diagrams/architecture.md for the full set of Mermaid diagrams.

There is nothing to install — this is a documentation repository. Read in this order:

1. Record-Centric Design
2. RBAC & Permissions Matrix
3. Integration Error Handling
4. Audit Logging Checklist
5. Deployment & Release Checklist

Use the checklists directly in pull-request templates or design reviews.

appian-enterprise-patterns/
├── README.md
├── LICENSE
├── .gitignore
├── diagrams/
│   └── architecture.md            # Mermaid diagrams
└── docs/
    ├── record-centric-design.md
    ├── rbac-permissions-matrix.md
    ├── integration-error-handling.md
    ├── audit-logging-checklist.md
    └── deployment-release-checklist.md

• Patterns are opinionated defaults, not laws — adapt them to your context.
• No runnable code is shipped here; sibling repositories cover working samples.
• Examples avoid version-specific features so they age well.

• Add a data-model review checklist
• Add anti-patterns catalogue ("what not to do")
• Add a lightweight ADR (Architecture Decision Record) template

Released under the MIT License.